| Month | Cypress/Yew | London Plane | Grasses | Plantain | Olive | Birch | Privet | Alder | Maple | Mugwort | Chestnut | Composites | Hazel | Heather | Eucalyptus | Ash | Mulberry | Elm | Pine | Poplar | Goosefoot/Amaranth | Oak | Sorrel | Willow | Nettle | Other | Unidentified |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| January | 846 (Very high) | 1 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 14 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 2 |
| February | 1,694 (Very high) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 50 (High) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 33 (Medium) | 0 (Low) | 50 (High) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 4 (Low) | 0 | 3 |
| March | 637 (Very high) | 3 (Low) | 12 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 20 (Medium) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 25 (Medium) | 3 (Low) | 96 (High) | 17 (Medium) | 1,389 (Very high) | 1 (Low) | 5 (Low) | 1 (Low) | 13 (Low) | 6 (Low) | 6 | 37 |
| April | 37 (Medium) | 1,133 (Very high) | 28 (Low) | 71 (High) | 11 (Low) | 17 (Medium) | 2 (Low) | 2 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 2 (Low) | 2 (Low) | 2 (Low) | 109 (Very high) | 11 (Low) | 33 (Medium) | 342 (Very high) | 9 (Low) | 1,040 (Very high) | 45 (Medium) | 25 (Medium) | 29 (Medium) | 28 | 14 |
| May | 68 (Medium) | 41 (Medium) | 429 (Very high) | 135 (Very high) | 394 (High) | 2 (Low) | 1 (Low) | 0 (Low) | 34 (Medium) | 0 (Low) | 7 (Low) | 12 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 234 (Very high) | 1 (Low) | 12 (Low) | 880 (Very high) | 62 (High) | 16 (Medium) | 15 (Medium) | 28 | 41 |
| June | 41 (Medium) | 10 (Low) | 225 (Very high) | 82 (High) | 301 (High) | 1 (Low) | 9 (Low) | 0 (Low) | 19 (Medium) | 0 (Low) | 2 (Low) | 13 (Low) | 2 (Low) | 7 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 292 (Very high) | 2 (Low) | 5 (Low) | 103 (Very high) | 38 (Medium) | 0 (Low) | 9 (Low) | 35 | 23 |
| July | 5 (Low) | 5 (Low) | 44 (Medium) | 20 (Medium) | 4 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 4 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 14 (Low) | 0 (Low) | 12 (Low) | 3 (Low) | 2 (Low) | 0 (Low) | 6 (Low) | 10 | 6 |
| August | 4 (Low) | 4 (Low) | 8 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 18 (Medium) | 2 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 6 | 6 |
| September | 2 (Low) | 2 (Low) | 7 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 23 (Medium) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 | 2 |
| October | 6 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 6 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 | 2 |
| November | 77 (Medium) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 2 |
| December | 143 (High) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 | 1 |